15 replies to this topic

[divyatiwari000]

respected sir
i m currently doing the project on hydrodynamic effect and optimization in reciprocating compressor piston ring and effect of lubrication on it. could u pls help me hw shuld i choose piston ring design and coresponding lubrication for it. and which r the best rrefernce book for it.and how shuld i optimized .my professor guded me to do simulation analysis for it . but i m unable to understand hw shuld i start first. it will be a great help from ur side if u help.. waiting for reply

thanku
divya

[ankur2061]

Divya,

 

Are you familiar with the working of reciprocating compressors? Are you a mechanical engineering student or a chemical engineering student?

 

Your engineering discipline is important to know, since mechanical component design of compressors or for that matter any rotating machinery is not the area where chemical engineers generally get involved.

 

Hydrodynamic behavior of piston rings and lubrication of piston rings for optimized hydrodynamic behavior is an area where rotating machinery specialists with specialized knowledge in mechanical component design get involved. 

 

Nevertheless, to get some introductory idea in mechanical component design of compressors the following books are a recommended read:

 

1. A Practical Guide to Compressor Technology by Heinz P. Bloch

 

2. Compressor Handbook by Paul C. Hanlon (Chapter 17)

 

3. Compressors,: Selection and Sizing by Royce N. Brown (Chapter 3)

 

Hope this helps.

 

Regards,

Ankur.

[aroon]

Divya,

 

As well guided by Ankur, you should clear your basic first then you have to move ahead for the optimization. Without clearing basic nothing can be done for the optimization.

 

As per my understanding, this is your some sort of research project for which you will have to use "Computational Fluid Dynamic" simulation tools to do micro level analysis of molecular movements around the piston rings. You may be interested in Lubrication between piston and cylinder (to reduce frictional loss between clearance), Heat dissipation due to friction, and impact of both of these on the power consumption.

 

There are several CFD simulators (Fluent.inc, CFX, COSMOS Flowworks, etc) are available to do such kind of research work. Many of the manufacturer's are also doing same type of study to optimize their machines. Search on google and research oriented web sites (e.g. Sciencedirect) to find out more relevant materials, which can be a report of same sort of study but for different systems.

 

However, I don't know, whether you have access to any one of the above mentioned software tools, as license for those are very costly. Also, this type of study is very complex and require good guidance. So always raise questions to your professor if you are not understanding something. 

 

All the best,

Aroon

[divyatiwari000]

sir yes I m familiar with wrking of rceprocating compressor. I m mechanical engineer specialization in machine design. I m in project phase. what are the further things I can add over it

[divyatiwari000]

aroon sir as u have guided me to do computational fluid dynamic analysis in our college liscence version of ansys software is there can I use that.

[ankur2061]

Divya,

 

I did a google search for topics that might relate to your query and I came up with several hits that would be relevant to your study / project:

 

http://docs.lib.purd...14&context=icec

 

http://www.recip.org/192.0.html

 

http://docs.lib.purd...78&context=icec

 

http://docs.lib.purd...80&context=icec

 

http://www.tribology.../2005/1-2/7.pdf

 

Besides the books I mentioned there is a lot of literature on the internet to help you out in your project work.

 

Regards,

Ankur

[aroon]

Yes. You can use it for your project provided your Ansys licence should be accompanied with module related to fluid dynamics and heat transfer. I guess Ansys modules like AsysCFX and AnsysFluent have capability to do so.

 

However, 1st of all you have to define your scope of optimization in your project and also you should also be very thorough with the subjects like thermodynamics, fluid flow, and heat transfer. Following are the core areas where you may target if your intention is around the piston.

 

1. Effect of clearance on performance.

2. Effect of different types of lubricants.

3. Effect of different type of material of construction for the piston ring (this is important due to surface roughness).

 

All the above areas are very much important and have their effect directly on efficiency of the compressors.

 

Regards,

Aroon

[divyatiwari000]

sir i m going to optimize the effect of different lubrication over different piston ring and what result i m gona get after performing it. that is the main focus area of my project.

[aroon]

Great! .... All the best ..

 

If you are from India and near to Mumbai or Pune then you may also try for the help from following institute (Professors and their subordinates)

 

ICT (formerly UICT/UDCT) - Mumbai: Professor J. B. Joshi and their group.

NCL - Pune: Professor V. V. Ranade and their group.

 

There are lots of research going related to CFD modelling for system optimization.

 

Cheers ...

[divyatiwari000]

sir I m frm mumbai culd u provide with email and contact detail....it will be a great help.....hw shuld I proceed further for mynproject guide me fr that

[aroon]

I don't have their contact details now. I can try to find for you through my friends. I cannot share contact details through public post. Give me your e-mail ID. I will send on that once available with me.

 

However, you can try through some of your friends studying there (if any) or you can also approach directly. They will surely entertain you.

[divyatiwari000]

thanku ankur sir.....I gone to website which u have posted it gave me more clear view thanku for ur help....will need more help from u...thanku once again

[divyatiwari000]

respected sir

 

what are the different piston ring design we can use for reciprocating compressor and also what are the differnent lubrication we can use on compressor.? i have read many paper in which people written mineral oil as a lubrication can be used but it is nt yet sucessful? can u pls explain in detail. i m unable to understand that thing?

[Art Montemayor]

Divya:

 

You are repeating yourself regarding your topic and you haven’t researched, read, and studied the excellent material that Ankur has so kindly led you to.

 

You have the detailed answer to your specific request in one of the websites that Ankur has furnished you: European Forum for Reciprocating Compressors.

 

If you do your research, you will find that there are various ways to lubricate the piston rings (not the crankcase and running gear) of a reciprocating compressor.  I have used in the past such lubricants as: mineral oil, Mobil 103, glycerin, Teflon, Peek, and soap (for oxygen compression).

 

What – specifically – is it that you don’t understand about lubricating a moving piston with piston rings?

[divyatiwari000]

sir can u suggest some standard books for ring tribology and calculation of piston ring profile and lubrication.

[divyatiwari000]

respected sir

 

as i have done the CFD analysis of piston ring material and the bio-lubricant with the help of ANSYS.i m unable to understand which optimization tool will be used.and how can i do the experimental analysis of it. my project guide is saying i need to analyse with experimental analysis.

i have searched near by my area but this kind of experiment no one do.

 

sir its a request show me some way how shuld i conclude to my result??? pls help me sir